Improvement in blowers



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IMPROVEMENT IN BLOWERS.

Specification forming part of Letters Patent No. 117,776, dated August8, 1871.

To all whom it may concern:

Be it known that I, SAMUEL H. HARTMAN, of Allegheny, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Blowing Apparatus for Furnaces and otherpurposes, and I do hereby declare the following to be a full, clear, andexact description ofthe same, reference being had to the accompanyingdrawing making a part of this specification, in which- Figur-e 1represents a perspective view of a blowing-cylinder with my improvementattached. Fig. 2 represents a vertical section through the same.

Similar letters of reference where they occur in the separate figuresdenote like parts of the apparatus in the drawing.

My invention relates to the use of mechanical devices or appliances foropening' and closing the valves of blowing apparatus, said devices orappliances being operated by a force other than that of the blastitself.

To enable others skilled in the art to make and use my invention, I willproceed to describe the same with reference to the drawing.

A represents a blowing-cylinder, in which a piston-head, B, is caused toreciprocate by any first-moving power applied to the piston-rod C.

In the heads D of the cylinder is made any suitable number oi' openings,that are controlled by valves E, and one or more openings, F, into andthrough which the blast is drawn or driven, through suitable air-trunksor pipes, to the furnace where it is to be used. Outside ofthe cylinderA there is a frame, G, which is reciprocated by force or power appliedto it from any ordinary source; and connected with this frame is anumber of projections, a, one for each valved opening, which projectionscoming against theirrespective valves bear Athem open, and when theymove away again the valves are closed by the reaction of the springs b.The valves are-thus opened and closed by a positive motion independentlyof the force ofthe blast.

I have herein shown the valve-openers as worked from an eccentric, H, ona turning shaft, I. They may be operated and the valves moved and openedby any other mechanism, only so that they are moved independent of theforce of the blast or pressure that is upon them. l have shown springswhich, by their recoil, close the valves after they have been opened.Other appliances may be used and eii'ect the same purpose. I prefer toarrange the hinges of the valves radial to the cylinder, and so thatthey shall swing open upon such radial joints; but they may be arrangedotherwise and still accomplish a good purpose. The force of thecompressed air in i'ront of the piston holds the valves shut, as theyare arranged to open inwardly in relation to the cylinder. Thecross-heads Gr that carry the valve-openers a, being united by thetie-rods, and all of which I have termed aframe, as they arereciprocated alternately open the valves, iirst at one end of thecylinder and then at the other end, and the opening of said valves istimed to suit the reciprocation of the pistonhead B in the cylinder.

Having thus fully described my invention, what I claim therein as new,and desire t0 secure by Letters Patent, is- A In combination with thevalves of a blowingcylinder that are closed by a spring or other similaracting device, a mechanism for alternately opening said valvesindependent of the pressure that may be upon them, substantially as de-I scribed.

SAML. H. HARTMAN.

Vitnesses:

T. W. HARTMAN, W. GIBSON MILLER.

